80849381 has 4 divisors (see below), whose sum is σ = 80868000. Its totient is φ = 80830764.

The previous prime is 80849357. The next prime is 80849383. The reversal of 80849381 is 18394808.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80849381 - 2¹⁸ = 80587237 is a prime.

It is a super-2 number, since 2×80849381² = 13073244816166322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80849383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1040 + ... + 12758.

It is an arithmetic number, because the mean of its divisors is an integer number (20217000).

Almost surely, 2^80849381 is an apocalyptic number.

It is an amenable number.

80849381 is a deficient number, since it is larger than the sum of its proper divisors (18619).

80849381 is a wasteful number, since it uses less digits than its factorization.

80849381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18618.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 80849381 is about 8991.6283842250. The cubic root of 80849381 is about 432.4065192733.

The spelling of 80849381 in words is "eighty million, eight hundred forty-nine thousand, three hundred eighty-one".